Dump-car.



J. 0. NEI'KIRK. f

DUMP GAR.

APPLICATION FILED DEC. 23, 1969.

Patented Apr. 29, 1.913.

.2 SHEETSSHEET 1.

STATES PATENT OFFICE.

JOHN D. NEIKIBK, OI CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL DUI? CABCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF a Duncan.

Specification of Letters Patent. 1 Ap lication and December as, 1909.Serial Ho. 535,355.

Patented Apr. 29, 1913.

To all zizfiom it may concern;

Be it'known that I, JOHN O. Nummn, a citizen of. the United States,residing at ,C'hicago, in the county of Cook and State of Illinois,vhave invented certain new and usevful Improvements in Dump-Cars, ofwhichthe following is a specification.

The object of my invention is to improve i the construction ofv cars ofthe National type in. which dum doors are operated by a reciprocable shat which moves transversely of the hinge axis of the doors. Cars of thistype are illustrated in reissuedLeters Patent 12 447, granted to W. A.Gaswell February 6, 1906, and in the patent to Otis 858,013,-grantedJune 25, 1907. This.

type of caris familiar to those conversant with the railway art, and adetailed description thereof is therefore unnecessary..

. I have illustrated my invention as ap plied to a car in which the doorsupporting means is given its transverse movement by the engagement ofgears thereon with racks upon a stationary part of the car underframe.The broad principle of the invention, however, might be applied to carsin which the door supports are given their transverse movement by othermeans.

In the drawingsFigure 1 is a side eleva tion of one end of a car towhich my 'inven tion is a plied. Fig. 2 is a' fragmentary view partiallyin end elevation and partially insection. ig. 3 is a detail sectionalelevation showing the relation of the door supporting means to one ofthe Intermediate J cross members. Fig. 4 is a view similar to 3 showingthe parts adjacent the mid- The car to which my invention is appliedcomprises an underframe of any suitable design comprising a cepter Slll8 and an end sill and cross members 6, 5 and 7. Hinged.

adjacent the center of the car and at each side thereof are a series ofdump doors 9,

these being shown in the present instance as hinged to brackets 10secured to the cen ter sill adjacent the top thereof. Ordinarily therewill be 8 such doors upon each side of the car, one between each bolsterand end sill, and the remainder between the bolsters. The openings inwhich these doors operate are framed by the center s1ll,' the crossmembers and the car side, and half of each side of the car a shaft 12projects inwardly to the middle of the car through said slots from apoint outside of the end' sill 6. It has been customary in cars of thistype to provide means for moving this;

shaft transversely of thecar in the slots mentioned and to carry thedoors and the load thereon directly upon said shaft. In my improved car,however, I relieve the shaft 12 of the larger part of the weight of thedoors andsuper-imposed load and carry the doors and load upon doorsupports or rollers designated generally by the "reference numerals 2 inFig. 1 of the drawing.

Referring to Fig. 3, the door support 2 comprises a sleeve having anon-circular longitudinal opening, in the present instancehexagonahwhich opening is non-rov tatably engaged by the shaft 12' whichis also of hexagonal form. The sleeve which constitutes the main body ofthe door sup port 2 carries a gear wheel 13, preferably formed integraltherewith, and also a circular shoulder 14. Between the gear wheel 13and the shoulder 14 is an annular groove 15 which en ages and rests uponthecross member 7 o the underframe; The doors 9 rest upon the sleeve'forming the main body of the door support 2, the doors in thepresentinstance being provided with angle ir'ons 15' fixed to the underside thereof adjacent 95 their edges, the lower flanges of which angleirons contact directly with the door supporting member 2. Thecrossmember 7 is provided with a series of teeth 16, similar to thoseupon the cross member 5 illustrated in 100 Fig. 2. These teeth projectfrom the side of a reinforcing plate 17 which is riveted alon the loweredge of the slot 11 in the memier 7 and form a rack. The door support 2rests upon the reinforcing member 105 17, which as. shown in thedrawings, proects over the lower edge of the slot 11 in the member 7,and the rack formed of the teeth 16 meshes with the gear 13 upon themember 2.

It will be apparent that when the Shaft 12 i s'rotatedby any suitablemeans at the end of the car such; rotation will be 'imparted'to the doorsupport 2 and'through the coactlon of the gear 13 withtheteeth 16transversemove-ment will be impartedto both the shaft and the doorsupport 2.

The weight of the doors and load in'this con struction rests directlyupon the 'doo-r support 2 and is transmitted, therefrom to the crossmember 7 thus relieving the shaft 12 ,fromthe weight of the load, exce';)t such small part thereof as may be transmitted to' the shaft byreason of the force acting upon the opposite ends OI the sleeve 2 not'being T precisely equal. To all intents and purposes, However, theshaft 12 in the construction described serves the functionmerely of.lmparting rotation to the door supports 2 and is relieved. ofthe loadresting upon the doors. V r In Fig. 4 I have illustrated theconstruction atthe center of the car where the shafts leading from theopposite ends meet. The

door support 2shown.at the right of this view coacts with mechanism uponthe vcross member 5 similar to that described in con nection with thestructure shown in Fig.3.

llhe door supp'ort'2' at the left of Fig. 4 is carried upon a rail 17bracketed uponthe "cross memberrfi andcarrying rack teeth 16,

which'coacvwith gear 13. In the construction illustrated in Fig. l therail 17 is formed integrally with a bracket 18 which is riveted-tothecross member 5.. Between the ends of the shafts 12'leading fromopposite ends of the car is aplate 19 formed asillustrated 'and rivetedto the cross member 5 above thevslot 11 therein, the member 19 servingto'limit endwise movement of the shafts 12. w

In Fig. 5 I have illustrated the, construction at the'end ofthe car.This construc- ,tiontis similar to' that already described ex cept thatthe shoulder 14 is omitted, and upon the shaft 12 beyond the end sillratchet wheels -20+'21 are non-rotatably. mounted.

' One of the valuable features. of my improved structure lies in thefact that the gears 13 and rack teeth 16 are held in mesh by theengagement of the grooves-15 with the-cross members. In case the crossmem- .gitudinally' of the "car "when subjected to some unusual strainthe door supports with their gears will be carried with 'the cross tweenthe gears and the rack: teeth. i

that I have provided a ear of the INational} type in which thereciprocable o to the actual door'su'pporting members.

carrying out this idea it W1 be apparent that the principle canbeembodied infother 'forms of'mechanism. g

I claim:.

resting upon said'cros s membel y'anda sup.-

the adj acent serls.

derframe comprising a cross-member, dump doors at either-side of saidcrossmember, .rotatable and reciprocable supports fo'r sald tablyengaging said supports, and a single means bracketed to said crossmember or limiting the endwise movement of Isaid shafts. r

3. In a carvof the class described, an 11n- G. A. MGHUGH.

members thus retaining the engagement be-y' It'w'ill'be. apparent fromthe. foregoing crating shaft is relieved of the weight oft e doors andload and is required to perform: merely the service of transmittingrotation While I have described -a -splecific mode of that my inventionis not limited thereto and 1. In a car of-the class describedyan .un-jderframe comprising a cross member, sepm rate series of dump doors ateither .side Of said cross member, rotatable and reciprocable doorsupports for said'doors, onej-of said door supports under one 9f saidseries derframe, dump doors, rotatable and re'cipbers orany of thembecome displaced lonporting rail bracketed to said. cross member forcarrying the other ofsaid supportsb1280 2.. In a car. of the classdescribed, an un- I doors, separate operating shafts 'n'on-rota-v

